Plasma display device and method for driving the same

Abstract

Disclosed here is a method for driving a plasma display panel and a plasma display device capable of providing image display with a high contrast ratio and excellent quality by stabilizing an address discharge. According to the method, which is the method for driving a plasma display panel in which discharge cells are formed at intersections of scan electrodes, sustain electrodes and data electrodes, the field—that contains at least one sub-field having the all-cell initializing operation—and the field—that is formed of sub-fields having the selective-cell initializing operation only—are set at a ratio of 1:N (where, N takes an integer of 1 or greater). At the same time, at least in one sub-field of the field having the selective-cell initializing operation only, the scan-pulse width employed for the selective-cell initializing field is determined longer than the scan-pulse width employed for the field containing the all-cell initializing operation.

1. A method for driving a plasma display panel in which a discharge cell is formed at an intersection of a scan electrode, a sustain electrode, and a data electrode, the method comprising:
 setting an all-cell initializing field and a selective-cell initializing field at a ratio of 1:N (where, N takes an integer of 1 or greater, the all-cell initializing field is a field that contains at least one sub-field having the all-cell initializing operation, and the selective-cell initializing field is a field that is formed of sub-fields having the selective-cell initializing operation only); and 
 extending, at least in one sub-field, a width of the scan pulse applied in the selective-cell initializing field according to the N,
 wherein, one field period is formed of a plurality of sub-fields, each of the sub-fields having: 
 an initializing period for generating an initializing discharge in the discharge cells; 
 an address period for applying a scan pulse to the scan electrodes so as to generate an address discharge in the discharge cells; and 
 a sustain period for generating a sustain discharge so that the discharge cells emit light with a predetermined luminance weight, 
 
 each initializing period of the plurality of sub-fields carries out any one of the all-cell initializing operation for generating the initializing discharge in all the discharge cells where an image is to be displayed and the selective-cell initializing operation for selectively generating the initializing discharge in the discharge cells where the sustain discharge has occurred in the previous sub-field. 
 
     
     
       2. The method for driving a plasma display panel of  claim 1 , wherein panel temperature is detected and the N is determined according to the detected panel temperature. 
     
     
       3. The method for driving the plasma display panel of  claim 1 , wherein APL (average picture level) of an image to be shown is detected and the N is determined according to the APL. 
     
     
       4. The method for driving the plasma display panel of  claim 1 , wherein the N takes 1. 
     
     
       5. The method for driving the plasma display panel in any one of  claim 1 , wherein a sub-field having the all-cell initializing operation of the all-cell initializing field is one and only sub-field in all of the sub-fields. 
     
     
       6. The method for driving the plasma display panel in any one of  claim 1 , wherein a sub-field having the all-cell initializing operation of the all-cell initializing field has a minimum value of luminance weight in the sustain period in all of the sub-fields. 
     
     
       7. The method for driving the plasma display panel of  claim 2 , wherein a sub-field having the all-cell initializing operation of the all-cell initializing field is one and only sub-field in all of the sub-fields. 
     
     
       8. The method for driving the plasma display panel of  claim 3 , wherein a sub-field having the all-cell initializing operation of the all-cell initializing field is one and only sub-field in all of the sub-fields. 
     
     
       9. The method for driving the plasma display panel of  claim 2 , wherein a sub-field having the all-cell initializing operation of the all-cell initializing field has a minimum value of luminance weight in the sustain period in all of the sub-fields. 
     
     
       10. The method for driving the plasma display panel of  claim 3 , wherein a sub-field having the all-cell initializing operation of the all-cell initializing field has a minimum value of luminance weight in the sustain period in all of the sub-fields. 
     
     
       11. A plasma display device in which discharge cells are formed at intersections of scan electrodes, sustain electrodes, and data electrodes,
 wherein, one field period is formed of a plurality of sub-fields, each of the sub-fields having:
 an initializing period for generating an initializing discharge in the discharge cells; 
 an address period for applying a scan pulse to the scan electrodes so as to generate an address discharge in the discharge cells; and 
 a sustain period for generating a sustain discharge so that the discharge cells emit light with a predetermined luminance weight, 
 
 each initializing period of the plurality of sub-fields carries out any one of an all cell initializing operation for generating the initializing discharge in all the discharge cells where an image is to be displayed and a selective-cell initializing operation for selectively generating the initializing discharge in the discharge cells where the sustain discharge has occurred in the previous sub-field, 
 wherein, an all-cell initializing field and a selective-cell initializing field are set at a ratio of 1:N (where, N takes an integer of 1 or greater, the all-cell initializing field is a field that contains at least one sub-field having the all-cell initializing operation, and the selective-cell initializing field is a field that is formed of sub-fields having the selective-cell initializing operation only), and a width of the scan pulse applied in the selective-cell initializing field is extended at least in one sub-field according to the N.